Welcome to our shop! Below are our purchase instructions: ★★★★Please read the following instructions carefully before purchasing the product, and accept it when you take it: ★ The product is not universal, please confirm before buying, please download the CPU-Z software, and confirm the RAM model! If you are not sure, please contact customer service to answer, otherwise it will not be returned! ★Photo (appearance, color, origin, serial number) for reference only, random delivery, if any changes, please prevail in kind! Special requirements for the product, please contact me and then buy! ★Due to the unstable market conditions, the price will increase or decrease, and the price will not be returned, nor will the price be compensated. Please mind buying carefully. ★<Item Discription> Capacity -- 4GB KHX1600C9D3/4G Memory Speed [MHz] -- 1600 MHz Memory Specification Compliance -- DDR3 1600MHZ PC3-12800U Form Factor --DIMM 240-pin Technology -- DDR3 SDRAM Data Integrity Check -- Non-ECC RAM features -- Unbuffered, Non-Registered Supply Voltage -- 1.5V Fit --Desktop memory Color:Red/Blue ★<Packet Content> 1pcs 4GB/8GB DDR3 1333mhz/1600Mhz/1866Mhz Memory (the parameter you chose)